Research Area:  Machine Learning
Neural architecture search (NAS) has been proposed to automatically tune deep neural networks, but existing search algorithms, e.g., NASNet, PNAS, usually suffer from expensive computational cost. Network morphism, which keeps the functionality of a neural network while changing its neural architecture, could be helpful for NAS by enabling more efficient training during the search. In this paper, we propose a novel framework enabling Bayesian optimization to guide the network morphism for efficient neural architecture search. The framework develops a neural network kernel and a tree-structured acquisition function optimization algorithm to efficiently explores the search space. Extensive experiments on real-world benchmark datasets have been done to demonstrate the superior performance of the developed framework over the state-of-the-art methods. Moreover, we build an open-source AutoML system based on our method, namely Auto-Keras. The code and documentation are available at https://autokeras.com. The system runs in parallel on CPU and GPU, with an adaptive search strategy for different GPU memory limits.
Keywords:  
Neural architecture search
AutoML system
NASNet
Auto-Keras
Author(s) Name:  Haifeng Jin , Qingquan Song , Xia Hu
Journal name:  
Conferrence name:  Proceedings of the 25th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining
Publisher name:  ACM Library
DOI:  10.1145/3292500.3330648
Volume Information:  
Paper Link:   https://dl.acm.org/doi/abs/10.1145/3292500.3330648